The Smooth ER, or endoplasmic reticulum, contains many enzmes. Smooth ER looks like a folded line but unlike the rough ER, smooth ER does not contain ribosomes. Smooth ER contains enzymes that snythesize lipids that include, oils, phospholipids, and steroids. Also some enzymes contained in smooth ER of liver cells can help to detoxify drugs and poisons. The ER is continuous with the nuclear envelope and the cisternal space of the ER is continuous with the space between the two membranes of the nuclear envelope.
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